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http://dx.doi.org/10.4313/JKEM.2006.19.9.862

Characteristics on the Surge Capability of Bi-based Varistor Fabricated with ZnO Nano-powder  

Wang, Min-Sung (원광대학교 전기전자 및 정보공학부)
Park, Choon-Bae (원광대학교 전기전자 및 정보공학부)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.19, no.9, 2006 , pp. 862-867 More about this Journal
Abstract
Bi-based nano-varistors and micro-varistors fabricated with each ZnO nano-powder and micro-powder were studied about characteristics on the surge capability in this study. ZnO nano-varistors were sintered in air at $1050^{\circ}C$ for 2 hr. The voltage-current and residual voltage properties of ZnO nano-varistor were compared with their of ZnO micrio-varistor. As a result of these properties, our ZnO nano-varistor has about 3 times at operating voltage as compared with conventional ZnO varistor fabricated with micro-powder and the residual voltage was 8.06 kV at nominal discharge current 101kA in the lighting impulse current test. And then the residual voltage rate 1.72 of our nano-varistor has had better performance than the 1.79 of micro-varistor because ZnO nano-varistor has shown much quick response property because of increasing effective cross-section area. Also, to analysis surge capability took thermal images for pyrexia temperature distribution with each of the varistors after operating varistors. Nano-varistor doesn't have shown local overheating and can confirm accurate temperature grade on the surface of its.
Keywords
ZnO varistor; Nano-powder; Surge capability; Residual voltage;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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